JP5295011B2 - Golf club head - Google Patents

Description

  The present invention relates to a hollow golf club head capable of changing a center of gravity position and a head weight.

  Conventionally, the thing of patent document 1 is proposed as a hollow golf club head which can change a gravity center position. In the hollow golf club head of Patent Document 1, a weight member screwed into a screw rod is housed in a hollow portion of a metal head main body formed in a hollow shape, and the screw rod is rotated to thereby rotate the metal head main body. The weight member can be moved and adjusted in any one of the front-rear direction, the left-right direction, and the up-down direction.

  The golf club head of Patent Document 1 described above incorporates a mechanism for adjusting the weight by moving a weight member by rotation of a screw rod in the hollow portion of the metal head body when forming a hollow metal head body. When adjusting the position of the center of gravity of the metal head body after molding the club, the weight of the golf club is adjusted by rotating the screw rod and moving the weight member in the front / rear direction, left / right direction, and up / down direction of the metal head body. The characteristics of the golf club can be continuously changed without changing the swing weight balance (paragraph 0008).

JP 9-28844 A

  However, the golf club head disclosed in Patent Document 1 can change the center of gravity, but cannot change the head weight.

  In addition, when changing the center of gravity position of the club head using the weight member, there are a method of placing the weight member in one place and performing concentrated load and a method of placing the weight member in multiple places and performing distributed load. In any method, the center of gravity can be set at the same position. However, the golf club head disclosed in Patent Document 1 can only adopt the former method of concentrated load.

  The present invention has been made in view of the above circumstances, and a first object thereof is to provide a golf club head capable of changing both the center of gravity position and the head weight.

  Further, the present invention provides both a method of performing concentrated load by arranging weight members at one place and a method of performing distributed load by arranging weight members at a plurality of places when changing the position of the center of gravity of the club head. It is a second object to provide a golf club head that can be used.

In order to achieve the first object, the present invention provides :
A convex portion is provided along the periphery of the sole, a concave portion is formed inward of the convex portion, and an opening extending from the toe side to the back side is provided in the convex portion. A hollow head body in which a thread is formed on an inner wall, and one or more grooves are provided on the heel side inner wall of the convex part;
A cylindrical body disposed in the recess of the head body, one end of which is inserted into the groove, the other end extends near the opening and is movable along the opening, and is screwed on the inner wall. A cylindrical body with a mountain,
A thread member is formed on the outer wall, and a weight member that is removably screwed to the thread on the inner wall of the cylindrical body,
The cylindrical body is screwed into the thread of the opening from the outside of the convex portion, and the other end of the cylindrical body is pressed to press one end of the cylindrical body against the groove portion. There is provided a golf club head comprising a detachable fixing screw for fixing.

  In order to achieve the second object of the present invention, in the above-described golf club head of the present invention, a plurality of weight members are screwed so as to be able to advance and retreat to and from the threads on the inner wall of the cylindrical body. A golf club head is provided.

  In the golf club head of the present invention, the weight member is installed in the cylindrical body so as to be able to advance and retreat, and an opening is provided in the convex portion of the head body, and the convex of the other end of the cylindrical body is formed along the opening. The fixing position to the part can be changed. Therefore, by changing the position of the weight member in the cylindrical body or changing the fixing position to the convex portion at the other end of the cylindrical body, the center of gravity position can be changed, more specifically, the center of gravity distance and One or both of the centroid angles can be changed. The center-of-gravity distance refers to the distance from the shaft axis to the center of gravity, and the center-of-gravity angle refers to the angle formed by the straight line passing through the center of the tip of the shaft axis and the center of gravity and the face surface.

  In the golf club head of the present invention, the weight member is detachably installed in the cylindrical body. Therefore, the head weight can be changed by replacing the weight member arranged in the cylindrical body with one having a different weight.

  Further, when a plurality of weight members are installed in the cylindrical body, the above-described concentrated load can be performed by arranging the plurality of weight members at one place in the cylindrical body, and the plurality of weight members are arranged in the cylinder. Distributing loads as described above can be performed by arranging them separately from each other in the body.

  The golf club head of the present invention can change both the center of gravity position and the head weight. In addition, when a plurality of weight members are installed in the cylindrical body, when changing the position of the center of gravity of the club head, the weight member is arranged at one place to perform concentrated load, and the weight members are arranged at a plurality of places. Both methods of arranging and distributing load can be adopted.

It is the bottom view seen from the sole side which shows one embodiment of the golf club head concerning the present invention. FIG. 2 is a rear view of the golf club head of FIG. 1 viewed from the back side. It is sectional drawing along the FIG. 1A-A line. It is typical sectional drawing which shows the state which fixed the cylindrical body to the convex part of the head main body. It is a perspective view which shows a weight member. It is the bottom view seen from the sole side showing other embodiments of the golf club head concerning the present invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings. 1 to 3 show an embodiment of a golf club head according to the present invention. FIG. 1 is a bottom view seen from the sole side, FIG. 2 is a rear view seen from the back side, and FIG. It is sectional drawing along the A line. 4 is a schematic cross-sectional view showing a state in which the cylindrical body is fixed to the convex portion of the head body, and FIG. 5 is a perspective view showing the weight member.

  In the golf club head 10 of this example, reference numeral 12 denotes a head body. The head main body 12 has a hollow portion 14. A substantially elliptical convex portion 16 is provided along the periphery of the sole, and a concave portion 18 is formed inside the convex portion 16. An opening 20 extending from the toe side to the back side is provided in the convex portion 16 along the horizontal direction. The opening 20 is provided with a female screw portion 21 having a circular opening at every predetermined interval. On the inner wall of the female screw portion 21, a screw thread 22 is formed as shown in FIG. The female screw portions 21 are connected by a connection hole 23 having a narrow opening width. Further, as shown in FIG. 4, a circular groove (groove portion) 24 into which one end of a cylindrical body to be described later is inserted is formed on the heel side inner wall of the convex portion 16. Although not shown in the figure, a plurality of (about 3 to 6) round grooves 24 are arranged in parallel at a predetermined interval along the horizontal direction. There is no limitation on the material of the head body, and for example, it can be formed using a metal such as titanium, titanium alloy, stainless steel, aluminum, aluminum alloy, beryllium copper alloy, magnesium alloy, or fiber reinforced resin.

  In the figure, reference numeral 26 denotes a cylindrical body disposed in the recess 18 of the head body 12. The cylindrical body 26 has a substantially cylindrical shape and has a hemispherical insertion portion 28 on one end side. The insertion portion 28 is inserted into the circular groove 24 described above, and the other end is the opening described above. It extends to the vicinity of 20 and is movable along the opening 20. In addition, there is no limitation in the shape of the said insertion part, It can be set as appropriate shapes, such as a longitudinal cross-section trapezoid and a vertical cross-section square. Further, as shown in FIG. 4, a screw thread 30 is formed on the inner wall of the cylindrical body 26. There is no limitation in the material of a cylindrical body, For example, it can form with plastics, such as metals, such as stainless steel, titanium, titanium alloy, aluminum, and aluminum alloy, polyester, nylon.

  In the figure, reference numeral 32 denotes a weight member arranged in the cylindrical body 26. As shown in FIG. 5, the weight member 32 has a cylindrical shape, a thread 34 is formed on the outer wall, and a + or − driver insertion groove 36 is formed on the head. The weight member 32 is screwed to the thread 30 on the inner wall of the cylindrical body 26 so as to be able to advance and retract and to be detachable. In the present embodiment, one weight member 32 is arranged in the cylindrical body 26. There is no limitation on the material of the weight member, and for example, the weight member can be formed of metal such as tungsten, tungsten alloy, stainless steel, aluminum, aluminum alloy, or plastic such as polyester or nylon. The specific gravity of the weight member is suitably 0.9 to 19.3. Further, an elastic body such as a sponge can be packed in a portion other than the weight member arrangement portion in the cylindrical body so that the weight member does not move in the cylindrical body.

  In the figure, reference numeral 38 denotes a detachable fixing screw. As shown in FIG. 4, the fixing screw 38 includes a thread 40 on the outer wall of the shaft portion, a circular groove 42 into which the other end of the cylindrical body 26 is inserted on the bottom wall of the shaft portion, and a center core 43 at the bottom of the circular groove 42. A + -type or --type driver insertion groove 44 is formed in the head. When the fixing screw 38 is screwed into the screw thread 22 of the opening 20 from the outside of the convex portion 16 and rotated with the other end of the cylindrical body 26 inserted into the circular groove 42, the fixing screw 38 has a circular shape. The bottom portion of the groove 42 presses the other end of the cylindrical body 26, and one end of the cylindrical body 26 is pressed against the groove portion 24, thereby fixing the cylindrical body 26 to the convex portion 16. A circular ring washer 46 made of an elastic material is disposed at the bottom of the circular groove 42. In addition, a circular elastic body 47 is disposed between the center core 43 of the fixing screw 38 and the weight member 32. The elastic body 47 presses the weight member 32 so that the weight member 32 is cylindrical when swinging. Movement within the body 26 is prevented. The material of the fixing screw is not limited, and can be formed of, for example, a metal such as stainless steel, aluminum, an aluminum alloy, titanium, a titanium alloy, or a magnesium alloy, or a plastic such as polyester or nylon.

  In the golf club head 10 of this example, after the fixing screw 38 is removed from the convex portion 16, a driver is inserted into the cylindrical body 26 to rotate the weight member 32, and the weight member 32 is illustrated inside the cylindrical body 26. 1 is moved as indicated by an arrow X, or the other end of the cylindrical body 26 is moved along the opening 20 as indicated by an arrow Y, and then the cylindrical body 26 is fixed to the convex portion 16 with a fixing screw 38. By doing so, the position of the center of gravity can be changed. Further, the golf club head 10 of this example can change the head weight by exchanging the weight member in the cylindrical body 26. The insertion portion 28 at one end of the cylindrical body 26 may be inserted into an appropriate round groove 24 according to the position of the other end of the cylindrical body 26.

  FIG. 6 is a bottom view seen from the sole side showing another embodiment of the golf club head according to the present invention. In the golf club head 50 of this example, in the golf club head of FIG. 1, one weight member 52 having a large specific gravity made of tungsten alloy or the like is arranged on the heel side in the cylindrical body 26, and the specific gravity made of tungsten alloy or the like is arranged. By distributing another large weight member 54 on the toe side in the cylindrical body 26, the weight member is distributed. When weight distribution is performed in this way, even if the overall center of gravity is the same, the weight feeling and swing feeling of the swinging club are different compared to the concentrated load, and the distribution weight is easier to swing. The advantage that it is easy to feel ease of swinging can be obtained. Further, in the golf club head 50 of this example, a weight member (resin screw) 56 made of nylon or the like having a small specific gravity is disposed between the weight members 52 and 54 in the cylindrical body 26, and the weight members 52, By filling an elastic material 58 such as a sponge on the outside of 54, the weight members 52, 54 are prevented from moving in the cylindrical body 26 during a swing. Since the golf club head 50 of this example is the same as the golf club head of FIG. 1 in other points, the same components as those in FIG. 1 are denoted by the same reference numerals in FIG. Omitted.

  The golf club head of the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the gist of the present invention. For example, in the above-described embodiment, one cylindrical body is disposed in the recess, but a plurality of cylindrical bodies may be disposed. The length of the opening extending from the toe side to the back side can also be set as appropriate.

DESCRIPTION OF SYMBOLS 10 Golf club head 12 Head main body 14 Hollow part 16 Convex part 18 Concave part 20 Opening part 22 Screw thread 24 Round groove (groove part)
26 Cylindrical body 30 Screw thread 32 Weight member 34 Screw thread 38 Fixing screw (fixing member)
50 Golf club head 52, 54 Weight member

Claims (2)

A convex portion is provided along the periphery of the sole, a concave portion is formed inward of the convex portion, and an opening extending from the toe side to the back side is provided in the convex portion. A hollow head body in which a thread is formed on an inner wall, and one or more grooves are provided on the heel side inner wall of the convex part;
A cylindrical body disposed in the recess of the head body, one end of which is inserted into the groove, the other end extends near the opening and is movable along the opening, and is screwed on the inner wall. A cylindrical body with a mountain,
A thread member is formed on the outer wall, and a weight member that is removably screwed to the thread on the inner wall of the cylindrical body,
The cylindrical body is screwed into the thread of the opening from the outside of the convex portion, and the other end of the cylindrical body is pressed to press one end of the cylindrical body against the groove portion. features and to Lugo Ruff club head that includes a detachable fixing screws for fixing. The golf club head according to claim 1 , wherein the plurality of weight members are screwed to the thread on the inner wall of the cylindrical body so as to be able to advance and retract.

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